Delete late parsed attributes instead of leaking them.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154746 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseDecl.cpp b/lib/Parse/ParseDecl.cpp
index be84cdc..884820e 100644
--- a/lib/Parse/ParseDecl.cpp
+++ b/lib/Parse/ParseDecl.cpp
@@ -756,6 +756,7 @@
   for (unsigned i = 0, ni = LAs.size(); i < ni; ++i) {
     LAs[i]->addDecl(D);
     ParseLexedAttribute(*LAs[i], EnterScope, OnDefinition);
+    delete LAs[i];
   }
   LAs.clear();
 }